Time-Delay List Builder

Rather than the default 'exit intent' popup, you can try showing your email popup at a certain number of seconds after the user hits your site. A time-delay list builder popup is typically shown to many more people than an exit intent popup so it can be a good way to improve number of activations. You should also experiment with how many seconds to wait, as it can make a big difference to activations and the quality of the leads you get.